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neighbour: fix unaligned access to pneigh_entry

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[ Upstream commit ed779fe4c9b5a20b4ab4fd6f3e19807445bb78c7 ]

After the blamed commit, the member key is longer 4-byte aligned. On
platforms that do not support unaligned access, e.g., MIPS32R2 with
unaligned_action set to 1, this will trigger a crash when accessing
an IPv6 pneigh_entry, as the key is cast to an in6_addr pointer.

Change the type of the key to u32 to make it aligned.

Fixes: 62dd93181a ("[IPV6] NDISC: Set per-entry is_router flag in Proxy NA.")
Signed-off-by: Qingfang DENG <qingfang.deng@siflower.com.cn>
Link: https://lore.kernel.org/r/20230601015432.159066-1-dqfext@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Qingfang DENG 2023-06-01 09:54:32 +08:00 • committed by Greg Kroah-Hartman
commit 7e0da73ce5
1 changed files with 1 additions and 1 deletions
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2
include/net/neighbour.h
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@ -174,7 +174,7 @@ struct pneigh_entry {
struct net_device *dev;
u8 flags;
u8 protocol;
u8 key[];
u32 key[];
};
/*